Volume 56, Number 6, December 2001
|Page(s)||884 - 890|
|Section||Condensed matter: electronic structure, electrical magnetic and optical properties|
|Published online||01 December 2003|
Self-assembled magnetic nanostructures of with favoured chemical ordering
University of Konstanz, Department of Physics -
Universitätsstr. 10 P.O. Box M621 D-78457 Konstanz,
2 Institut de Physique et Chimie des Matériaux de Strasbourg, UMR46, CNRS-ULP 23 rue du Loess, F-67037 Strasbourg, France
Corresponding author: email@example.com
Accepted: 4 October 2001
(111) nanostructures, prepared by self-assembled growth on (0001) substrates, present a 111-oriented fcc structure with a hexagonal island shape and a relatively narrow size distribution. -type ordering is already observed in nanostructures grown at 150, a temperature considerably lower than that required to order continuous films. This change is attributed to the nanoscopic island shape, which increases the possibilities of surface atomic arrangements provided by the different growing facets. From the superparamagnetic behavior of the nanostructures, a strong decrease of magnetic anisotropy with the occurrence of ordering is deduced.
PACS: 75.75.+a – Magnetic properties of nanostructures / 81.07.-b – Nanoscale materials and structures: fabrication and characterization / 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EDP Sciences, 2001
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